Spark Plug Tester Ignition Plug Analyzer Car Motorcycle Spark Detector Ignition Coil Checker 12V

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Dual Hole Car Spark Plug Tester Detector have two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment.
To Test spark plug performance and ignition strength, apply to 12V Gasoline vehicles car spark plugs.
Adjustable double hole car spark plug tester detector Ignition Plug Analyzer Diagnostic Tool
Car Spark Plug Tester Detector with Dual Hole Advantage:
Dual Hole Car Spark Plug Tester Detector have two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment.
Usage: Test spark plug performance and ignition strength
Application Range: 12V Gasoline vehicles car spark plugs
Car Spark Plug Test principle:
In automobile ignition system, the high-voltage ignition coil generates a high-voltage (10000 volts or more), and the spark plug diverts it form high tension ignition coil into the cylinder engine, spark between the spark plug electrodes will ignite the mixture. The Detector could tell the good spark plugs from the bad by the strength of the spark.